I never used to dream—I tell a lie, I did dream when I was little.

我以前从不做梦 我撒谎了 我小时候确实做梦

It is wrong to tell a lie.

撒谎是错误的。

You should not tell a lie.

你不应该撒谎。

You must not tell a lie.

你不应该撒谎。

I will never tell a lie.

我是绝对不会撒谎的。

I do believe she doesn't tell a lie.

我真的相信她没有撒谎。